What shape should a bus driver look for when identifying standard hazardous materials labels on cargo?
Correct answer: B – Diamond
Standard hazardous materials hazard labels are diamond-shaped, or square-on-point. Bus drivers should watch for these labels on cargo and baggage because most hazardous materials cannot be transported on a bus. A driver should not accept hazardous material unless the applicable rules allow it.
Source: Wisconsin Commercial Driver’s Manual — § 4.2.1, “Hazardous Materials”, 49 CFR § 172.407(c) – Label Specifications

